1341 N. Delaware Avenue, Suite 405, Philadelphia PA 19125 (215) 425-2556 v. (215) 425-2563 f.


About Us

Mission & Philosophy


Land Planning

Landscape Architecture



J. Mark Wiedmann, AIA

Career Profile:

Mr. Wiedmann is the Principal in charge of design, programming, and project team assembly. His primary responsibility is for the leadership and management of the design and quality of detail for the firm's major projects. With 20 years of experience, Mr. Wiedmann is an expert in all aspects of residential design including the design of mid- and high-rise multi-family residential. He has also been responsible for the development and management of governmental facilities and development for the United States Postal Service, Assisted Living Residential, Commercial, Retail, Office and other multidisciplinary/mixed use projects.
Mr. Wiedmann has won numerous awards and honors for his work including Best in American Living Awards and an award for the design of the "Francisville Housing Competition: Innovations in Affordable Housing & Neighborhood Revitalization." Mr. Wiedmann has also served as Chairman of AIA Philadelphia's Housing Committee and is a plan reviewer for Professional Builder Magazine. He has lectured on urban in-fill initiatives, and has been an NAHB Convention speaker on the Design Committee.

Master of Architecture, The Catholic University of America, 1980
Bachelor of Science in Architecture, The Catholic University of America, 1978

Certifications and Registrations:
Registered Architect in New Jersey, Pennsylvania, New York and Delaware.
American Institute of Architects Philadelphia Chapter Chairman, AIA Housing Committee

Professional Experience:
Principal, Wiedmann – Zelig Group, LLC 2001-Present
Principal, Mike Rosen & Associates, P.C. 1990-2001
Senior Designer, The Martin Organization 1982-1990
Intern Architect, Chapman & Associates 1980-1982

Selected Project Experience:

Delaware State Housing Authority
Principal in charge and project designer/director for several DSHA Community facilities additions and modernizations. This work included new computer labs, administration offices and community room renovation for Liberty Court as well as a new administration offices and maintenance facility at McLean Gardens.

Philadelphia Housing Authority
Principal In Charge of term contract with PHA for various needs assessment studies and residential modernization and ADA compliance programs. Gilman Development Corporation: Design and programming of affordable multi-family housing prototypes in Delaware, Maryland and Pennsylvania including coordination with the various state housing authorities.

GimSan Plaza, Philadelphia, PA
Mixed use development in Chinatown area, at previous office. Responsibilities included the design, program and details of this project. Worked closely with the Chinatown CDC on this project.

United States Postal Service
Principal in charge of Term Contract with the USPS. Projects included renovations to existing facilities, tenant fit-out for new retail stations and new construction regional post offices in Pennsylvania, New Jersey and Delaware. Services provided USPS design and construction standards implementation for full architectural and engineering services from pre-design through full Contract Administration including need assessment and site acquisition assistance. Selected projects include Roxborough Retail Station, Fairmount Retail Station, Old City Retail Station, Bustleton Main Station, Roxborough Distribution Station, Apollo Station, Springfield/Media Station and Middletown Main Station.

Dairy Express
Development of prototypical Drive-Thru convenience store. The building design emphasized the ‘Image’ as an easily recognizable roadside trademark with the ability to fit within existing Neighborhood commercial corridors.

Age Restricted Senior Housing Developments
Design of Luxury and Market-Rate Multifamily Town home and apartment communities for large and small private developers. Many developments were taken through site yield studies and Zoning variances. Projects range in size from 28 to 250 unit developments. Special attention was paid to the exterior and theme of these communities for market appeal as well as ‘Neighborhood’ enhancement opportunities to the local community.

2813 Medical offices, Philadelphia PA
9,000 sf renovation and addition to an existing retail tire store. Program was developed to accommodate ‘office Pods’ for flexibility of operations.

Design and Programming: For large national and local merchant builders
Mr. Wiedmann was also involved in the design and development of congregate care and independent living facilities for the Radice Care Organizations, Horizon Clubs, Advantage Health Group, Gables communities and the Marriott congregate facility prototypes.

Saint Edmunds Rectory, Rehoboth Beach, DE
Programming, design and construction administration for this addition project.

New Garden Township Building, New Garden, PA
Programming and design of a township building including assembly room, police room with an office and storage facility, other offices, conference room and lobby with secretary’s space.

PCS Technologies Office and Warehouse, Newtown Square, PA
Design of multi-occupancy building including loading dock access.

James Development Golden Pond Communities, Winter Garden, FL
Project designer of program for 20-unit and 10-unit assisted living facilities prototypes.

Clara Barton School, Edison, NJ
Project Director for planning and design of a renovation to convert the facility into a Congregate Care facility.

Hershey Mill Age Restricted Golf Course Community
Design and development of new high-end multi-family product as well as renovations to existing clubhouse facilities.